Garurumon is pretty fast and he also packs a mean bite. Pikachu can use his speed to evade Garurumon’s lower forms, but once he hits his Mega (Or Super Mega) form then all bets are off. Pikachu has great speed and agility, but he won’t be able to dodge the whole arsenal and attack enough to win before getting blown away. Garurumon wins.
DReager1.com 
Wait.. Do you mean Gabumon or Garurumon? Because, on the image it’s Gabumon vs Pikachu.
Well, since it’s composite Garurumon gets all of his forms including Gabumon so it’s okay. The picture just looked cool so I figured that I would go with that one
Ah, understandable. Gabumon vs Pikachu would be a fair and a nice fight, but Garurumon won’t be a bad match either although Pikachu might not easily defeat Champion Digimon
I think with the Champion Digimon it definitely varies although I could confidently say that I would put Pikachu over most simply because of how uncanny his speed is. It would be tough to tag him